I've got several servers running v76 and I'm getting the same warning on all the servers in the Backup Restoration area: The system cannot restore backups because it does not store those backups locally.
We have our servers configured to send our backups to S3 but we don't retain a copy of them on the local servers. In the past I've been able to download the backup tarball to the correct directory and then it would populate in Backup Restoration. So for example, I would go to S3 and find the file, go to the server and upload that file to /backups/2018-11-30/accounts and then be able to restore that account to that date. I found a workaround whereby if I enabled the option to Retain Backups in the Default Backup Directory the restoration module would find the files again, but if I (or someone else) were to forget to uncheck that after restoring, we'd potentially end up with backup files filling our local storage.
We have our servers configured to send our backups to S3 but we don't retain a copy of them on the local servers. In the past I've been able to download the backup tarball to the correct directory and then it would populate in Backup Restoration. So for example, I would go to S3 and find the file, go to the server and upload that file to /backups/2018-11-30/accounts and then be able to restore that account to that date. I found a workaround whereby if I enabled the option to Retain Backups in the Default Backup Directory the restoration module would find the files again, but if I (or someone else) were to forget to uncheck that after restoring, we'd potentially end up with backup files filling our local storage.